Forgive me if this has been comprehensively answered elsewhere, but I can't find it.
I am thinking of using a number of enlarging lenses on my GH2 for macro work. I understand that this is possible but am hopelessly confused about what I need.
From what research I have been able to understand, I need something to reverse mount the lens (?) and possibly something called a focusing helicoid (which I don't really understand but imagine allows focusing for a fixed focus lens).
Can anyone point me to a thread which explains this in simple terms or attempt the same while pointing me to sources for the necessary adapters.